Durability Mouth Guard for Heavy Teeth Grinding


Extreme Strength, Ultimate Protection

Not all teeth grinding habits are the same. Heavy teeth grinding can wreak havoc on your smile and affect so much more than your quality of sleep. We understand the short and long term effects of heavy, chronic teeth grinding and clenching. Teeth wear, cracks, chips and sensitivity don’t just happen overnight but once it begins, costly dental repair is needed. This is why we created a durable mouth guard built to protect your smile.

Protecting Smiles, Wallets Too

Ask any dentist- there is simply nothing better to eat, laugh, talk and chew with than natural teeth. With Sentinel Mouthguards, your teeth are comfortably protected and your tooth structure stays preserved.

Our Durability Mouth Guard for Heavy Teeth Grinding is specifically designed to withstand intense teeth grinding and clenching, offering superior protection for even the most severe cases. Made from a strong, durable material, our mouth guard is engineered to absorb and distribute the force of your teeth grinding and clenching, protecting your teeth and jaw from the damaging effects of this common problem.

Experience the difference in just three simple steps:

Here's how it works 3 easy steps

Our simple and easy-to-use mold kit allows you to create a mold of your teeth from the comfort of your own home. Once we receive your mold, we’ll create a mouthguard that fits perfectly to your unique dental profile, ensuring maximum protection and comfort.

Say no to shortened, cracked teeth and hello to a healthy smile.

sentinel mouthguards smile

  • Prevents teeth from grinding and clenching
  • Relieves jaw pain, teeth pain, headaches, tooth sensitivity
  • Protects your teeth from fracture lines, chips, cracks and breakage
  • Prevents teeth shortening (from grinding and clenching)
  • Prevents long term dental issues and future dental repairs
  • Promotes better sleep and better oral health
  • Made in the USA
  • Safest materials. Our mouth guards do not contain BPA, silicone, gluten, latex, MMA, and phthalates.
  • Preserve your dental work with confidence. Our guards protect veneers, crowns, and other restorative dental work.
  • Our products are backed by our love it or your money back guarantee. We’re confident you’ll be completely satisfied with your purchase.

Expert Fit by Professional Lab Technicians

Since 2012, we have helped thousands of people just like you overcome their battle with teeth grinding and clenching. We’ve developed a simple and easy-to-use mold kit that allows you to create a mold of your teeth from the comfort of your own home. Once we receive your mold, we’ll create a mouth guard that fits perfectly to your unique dental profile, ensuring maximum protection and comfort.


Product Description

Sentinel Mouthguards Durability Night Guard: Non-Flexible, Long-Lasting, and Safe

Rise and Shine Grinning, Backed by Our Money-Back Promise

The Sentinel Guarantee

Crafting top-notch custom night guards and mouth guards right from St. Petersburg, Florida. We’re all about premium quality, uniquely tailored to you. Our skilled lab experts create each night guard, ensuring they meet our strict benchmarks. Your satisfaction, our priority.

  • 100% unconditional money-back guarantee: We’re confident that you’ll love your new night guard, but if for any reason you’re not completely satisfied, simply return it within 30 days for a full refund.
  • 30-day option to let us get it right: If you don’t love your new night guard within the first 30 days of receiving your guard, we’ll work with you to make it right. Our goal is to ensure that you get the best possible fit and protection for your teeth.
  • 1-year warranty: We also offer a 1-year warranty on all of our night guards, giving you added peace of mind and protection.

Due to the thicker nature of this mouth guard, we require that you take upper and lower teeth impressions for an even bite and to ensure proper occlusion.

why choose sentinel mouthguards graphic compare to dentist made custom night guard

How does it work?

Get ready for a seamless experience. We’ll send an impression kit with all you need for a precise dental mold. Mix, mold, and send it back in the prepaid envelope. Your custom mouth guard is crafted in 3-4 days. It’s hassle-free and ships for free!

What you’ll get:

  • A complete impression kit with instructions and prepaid return mailer
  • (1) Durability Night Guard
  • Breathable retainer case
  • 1 year warranty
  • Fast all inclusive FREE shipping

Avoid expensive dental repairs from teeth grinding and clenching

example of damage from teeth grinding and jaw clenching

Not sure which guard is right for you? Get expert guidance with our 60 second quiz!

find your night guard match now graphic

Our Commitment To You

At Sentinel Mouthguards, we’re committed to your satisfaction. That’s why we provide free night guard adjustments and always work to make sure you’re completely happy with your purchase.

Since 2012, we have helped thousands of people just like you overcome their battle with teeth grinding and clenching. We’ve developed a simple and easy-to-use mold kit that allows you to create a mold of your teeth from the comfort of your own home. Once we receive your mold, we’ll create a mouth guard that fits perfectly to your unique dental profile, ensuring maximum protection and comfort.


Additional Information

Weight 3 oz
Guard For

Upper teeth (most preferred), Lower teeth

Product Reviews

  • Sarah34

    I absolutely love it!
    My mouth feels so much relief and the customer service is spectacular. It is so much better than another company that I had tried previously. The fit is perfect for my mouth and I feel comfortable wearing it.

  • Mason Berger

    Been wearing mine for a few weeks and it’s been a life changer. My headaches and jaw soreness are gone! I’ve had many night guards through the dentist. I’ve paid a lot of money for these things. It’s nice to find an affordable option that still has the high quality I need. Thank you!

  • Iris W.

    Not super comfy at first but really nice looking. I love that they are super low profile and the quality is great for the price. I totally recommend these.

  • Tom Sphar

    Tip from a customer who learned the hard way! Don’t bite down into the putty. Keep your mouth relaxed and press the putty filled tray into your teeth evenly. After 3 tries I finally got it right!
    The sentinel team was gracious and gave me two free kits. Best company ever! My mouth guard fits perfect and my jaw feels so much better. No more popping and clicking!

  • Adam S.

    So first of all, this was super easy to take the impressions. All you have to do is mix the putty, place it in the tray and then slide the tray into the mouth. Push the putty up into the teeth and wait. It will get hard and may feel tough to pull out. Don’t panic. Just use more fingers to “pop” it off the teeth. A tip for putting the tray with putty into the mouth: have a timer on hand and stand in front of a mirror so you can see what you’re doing. It took me two attempts. This may sound confusing, but make sense when you are assembling it.

    Okay! The actual guard itself! It has really nice material & the shaping is well done. One piece in the front was a bit loose, but otherwise feels great. I’ve never had real quality guards so I can’t really compare it, but it seems sturdy.. I guess time will tell. I do wish the guard was a different color (it’s clear) because I just don’t want to misplace it..Now, the biggest concern for me is the comfort and they got that right. 5 stars!

  • Erin Chapman

    Great for teeth grinders! I needed a mouth guard for sleeping that wouldn’t be too big and uncomfortable that I take it out during the night. Wanted one just for the top teeth and less bulky than the one I got from my dentist. Tried the OTC ones and I just remove them during the night, or they cause my teeth and jaw to hurt by morning due to the imperfect alignment. THIS ONE IS PERFECT. I read some reviews that said it was difficult to take the impression, but I watched the YouTube video and got it perfect the first try. Follow the instructions, use a mirror to place it and you won’t have a problem. It is not necessary to bite down hard into the plastic when taking the impression. Really just stay focused on getting a good, even impression. Seems like a lot for a little piece of plastic, but my dentist wanted to make me one for $800, so this was a much better deal. And best part, woke up without a headache for the first time in years. Cheers!

  • Marcelly A.

    A++++ Superb customer service. Superb product. I wear my Sentinel guard nightly and won’t go anywhere else! Thank you!

  • Jaycin Diaz

    MIX FAST! I mixed my putty too slow and the putty hardened before I was ready. I contacted the sentinel team and they sent me new putty. 2nd time around went much better but mix quickly because the putty will harden and you will not be able to get your teeth into it! End product fit great. I’ve been wearing it nightly and have seen a significant reduction in my jaw pain and morning headaches.

  • Brenda Mcgillis

    I love my new guard! Thank you!

  • Craig H.

    I have an unusual dental anatomy and feared the dental guard would not fit correctly. These guys are true professionals. They somehow managed to make a great fitting guard for me and I couldn’t be more satisfied. I have had dental guards made by other online companies and none of them fit.

    I did have to take my dental impression twice. The first time, it was rejected. They said they needed a better impression and gave me a redo kit for free.
    I spoke with a lady on the phone who was very helpful in giving me some tips for a better impression.

    The guard came within a week 1/2 of sending off the impression. It does take a little bit of time to get used to but stick with it. It will become comfortable after a few days or so.

  • Charles C.

    I have a horrible case of bruxism (night teeth grinding) and bought this to help me because most products store bought ones are so thick they trigger my gag reflex. Because of the slim size and unique material of this night guard, it has been helping me finally get a good nights’ sleep.This is different than most other ones I’ve tried. Thanks!

  • Brian W.

    When something is good, you stick with it. This is my 3rd order from you guys. I’ve been grinding my teeth since I was little and this holds up better than any of the ones my dentist made. Thank you for an outstanding product.

Free Shipping

We ship your kit with everything you need from the molding trays and putty to the prepaid return packaging.

30 day guarantee

Try it out! If you’re not satisfied, you can always return the Mouthguard within 30 days for a full refund.

Save 20%

By entering coupon code "big spender", you save 20% on orders over $200.